document title / titre du document TRP W ORK PLAN ... - emits - ESA

TRP Work Plan 2005-2007
Description of Activities
TEC-SB/7935/dc
12/Feb/09
TRP Reference:
Title:
T601-11MC
Assessment and Improvement of Dynamic Test Data
Dynamic testing of spacecraft structures and components plays a crucial role in the qualification of the spacecraft as well as
the validation of corresponding dynamic models. Recent studies (RTMVI, Real Time Modal Vibration Identification, EDIS,
Enhancements of Dynamic Identification for Spacecraft) have provided new methods and tools allowing efficient use of test
data to improve the model validation process by considering base reaction measurements, real-time modal characterization
and the use of stochastic analysis to introduce inherent uncertainty or scatter in the models. These new methods allow a
much greater understanding of the model validation process, yet for the moment have focused primarily on the model in terms
of its capabilities and limitations in representing the physical structure – with little emphasis being placed on the
representativity of the test data itself. The objective of this study is to assess and improve the quality and representativity of
test data by introducing a set of testing procedures, methods and controls to be used during test preparation, execution and
post-test analysis and control. Description of sub-activities: review of state of the art in spacecraft testing; development of
improved pre-test methodology and procedures; development of improved post-test procedures and data validation methods;
validation using available spacecraft (“piggyback” application); and final assessment.
Deliverables:
Documentation of procedures.
Current TRL: TRL2 Target TRL: TRL4 Application Need/Date: TRL5 >2008
Application/Mission: all spacecraft subject to vibration testing Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-7578
Consistency with Harmonisation
Roadmap and Conclusions:
TRP Reference: T601-14MC
Title:
Random Vibration Environment derivation by Vibro-acoustic simulation
F.E. & SEA numerical simulations methods have been employed to derive the Random Vibration Environment (g2/Hz & grms)
at equipment I/F due to the launch acoustic load. Refined methods to derive also the I/F force (N2/Hz & Nrms) are requested
by Projects in order to avoid both the System over-design and the equipment delta qualification. A parametric analysis, taking
into account not only the mass but also location, panel configurations, boundary conditions and acoustic parameters, would
provide higher confidence in typical random vibration specifications. The objective of this activity is the derivation of the
Random Vibration Environment in terms of I/F acceleration and forces levels due to the Launch Acoustic Load; to provide
analytical and numerical procedures based on FEA and SEA and design guidelines; the identification of driving parameters by
analysis; and the definition of correlation procedures with test data.
Deliverables:
Documentation of procedures, mathematical models.
Current TRL: TRL2 Target TRL: TRL4 Application Need/Date: TRL5 >2008
Application/Mission: all spacecraft / equipment. Contract Duration: 18 months
SW Clause : - Dossier0 Ref.: T-562
Consistency with Harmonisation
Roadmap and Conclusions:
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